This image provided by the Ohio State University Veterinary Medical Center shows cats during a "play time" at the research lab. A recent Ohio State University study found that cats can show signs of ... more

This image provided by the Ohio State University Veterinary Medical Center shows cats during a "play time" at the research lab. A recent Ohio State University study found that cats can show signs of illness when stressed and owners can't stand the messes that come with it, so millions of sick cats are euthanized or turned over to shelters every year. This study also showed that an enriched environment _ one that includes hiding areas, toys, bedding and other physical features, plus an everyday routine reduces the incidence of ilness. less